Road tax for 2019 can be paid from yesterday. You have to pay it before December 31. You might not be able to print the form immediately because many people are trying. All you need is the owners of the car’s tax number and the license plate. Payable via Greek e-banking. Not sure abroad.
Go to the following website: http://www.gsis.gr and click where the arrow is
Click here
Click here
Click here
Click here
Fill in your Greek tax number and the number plate of your car
If all is ok this should show up
You can now print your payment sheet. See on the same sheet εκτύπωση
skopelosnews 
Thanks so much. It is so helpful!
Thanks Daphne.